<div class="input-group date">
    <input type='text' class='form-control' ng-model='doc[header]' ng-required='isRequired(header)'
             data-date-format="dd/MM/yyyy" bs-datepicker orientdate />
    <span class="input-group-btn">
        <button class="btn btn-default">
            <i class="fa fa-calendar">
            </i>
        </button>
    </span>

</div>